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Definition of di- combining form from the Oxford Advanced Learner's Dictionary

di-

combining form
 
/daɪ/
 
/daɪ/
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  1. twice; two; double
    • dicotyledon
  2. (chemistry) (in nouns that are names of chemical compounds) containing two atoms or groups of the type mentioned
    • carbon dioxide
  3. Word Originfrom Greek dis ‘twice’.
See di- in the Oxford Advanced American Dictionary
previously
adverb
 
 
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